Service Diagnosis; Ice Production Check; 2A. Diagnostic Procedure Auxiliary Code C-0 And Earlier - Hoshizaki F-330BAH Service Manual

B. Service Diagnosis
• The appliance should be diagnosed and repaired only by qualified service
personnel to reduce the risk of death, electric shock, serious injury, or fire.
• Risk of electric shock. Use extreme caution and exercise safe electrical practices.
• Moving parts (e.g., fan blade or auger) can crush and cut. Keep hands clear.
• CHOKING HAZARD: Ensure all components, fasteners, and thumbscrews are
securely in place after the appliance is serviced. Make sure that none have fallen
into the ice storage bin.
• Make sure all food zones in the icemaker and ice storage bin are clean after
service.

1. Ice Production Check

To check production, prepare a bucket or pan to catch the ice and a set of scales to
weigh the ice. After the appliance has operated for 10 to 20 minutes, catch the ice
production for 10 minutes. Weigh the ice to establish the batch weight. Multiply the
batch weight by 144 for the total production in 24 hours. When confirming production or
diagnosing low production, reference production information to the performance data
charts found in "VIII.B. Performance Data Sheet."

2a. Diagnostic Procedure Auxiliary Code C-0 and Earlier

This diagnostic procedure is a sequence check that allows you to diagnose the electrical
system and components. Before proceeding, check for correct installation, adequate
water supply (minimum of 10 PSIG, maximum of 113 PSIG), and proper voltage per
appliance nameplate. Check that the 24VAC 1A fuse is good, safety switch is open,
and GM external protector is closed. When checking for high-voltage (115VAC), always
choose a white (W) neutral wire to establish a good neutral connection. When checking
for low-voltage (secondary) (24VAC), always choose a light blue (LBU) neutral wire to
establish a good neutral connection.
Note: • DV energizes when BC opens.
• On -C model, EH energizes when X12 relay energizes.
1) Confirm the appliance is plugged into the electrical outlet, supply voltage is correct per
nameplate.
2) Remove the front panel.
3) Confirm the power switch is in the "ON" position, then move the flush switch to the
"FLUSH" position. DV Diagnosis: If DV does not energize, check for 24VAC at X6 relay
#5 (BK) to neutral (LBU) and at X6 relay #1 (W/O) to neutral (LBU). If 24VAC is present
at #5 (BK) and not at #1 (W/O), X6 relay is energized (safety switch closed) or contacts
sticking. Replace as needed. If 24VAC is present at X6 relay #1 (W/O) and DV does
not energize, check for 24VAC at X5 relay #6 (W/O) to neutral (LBU). If 24VAC is not
present, X5 relay is energized or contacts are sticking. Replace as needed. If 24VAC is
present, check DV coil continuity. If open, replace DV.
WARNING
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